submission

practice.js

@@ -1,84 +1,96 @@
 //We're in a job interview. Answer the following questions (try to not look at your notes unless you have to).
-  // 1) What is the purpose of the 'this keyword'?
+// 1) What is the purpose of the 'this keyword'?
 
-      //Answer
-
-  // 2) What are the four rules that govern what the 'this keyword' is bound to and describe each?
-
-      //Answer
-
-  // 3) What does .bind do?
-
-      //Answer
+//Answer
+//this property is a reference for an object where this 'this' is used.
+// 2) What are the four rules that govern what the 'this keyword' is bound to and describe each?
 
+//Answer
+//global - this refers to the global object.
+//implicit - this occurs when the dot notation is being used.
+//explicit - this uses the .call, .apply and .bind methods.
+//new binding - this occurs when new keyword is used.
+// 3) What does .bind do?
 
+//Answer
+//.bind creats a bound function that is called over the covered function.
 //Next Problem
 
 //Create an object called user which has the following properties.
-  //username --> which is a string
-  //email --> which is a string
-  //getUsername --> which is a function that returns the current object's username property. *Don't use 'user' instead use the 'this' keyword*
-
-    //Code Here
-
+//username --> which is a string
+//email --> which is a string
+//getUsername --> which is a function that returns the current object's username property. *Don't use 'user' instead use the 'this' keyword*
+
+//Code Here
+let user = {
+  username: "batman",
+  email: "user@email.com",
+  getUsername() {
+    return this.username;
+  }
+};
 //Now, invoke the getUsername method and verify you got the username of the object and not anything else.
-
-
+user.getUsername();
 //Next Problem
-
-
+function Car(make, model, year) {
+  this.make = make;
+  this.model = model;
+  this.year = year;
+}
+
+Car.prototype.moveCar = function() {
+  this.move += 10;
+  return this.move;
+};
 // Write a constructor function, including method definitions, which will make the following function invocations function properly.
 
-  //Function Invocations Here
+//Function Invocations Here
 
-var prius = new Car('Toyota', 'Prius', 2011);
-var mustang = new Car('Ford', 'Mustang', 2013);
+var prius = new Car("Toyota", "Prius", 2011);
+var mustang = new Car("Ford", "Mustang", 2013);
 
 //Hint, you'll need to add a move property, with a starting value of zero, and write a moveCar function which will increment the move property by 10. The move property will be added to every object that is being returned from the Car function. You'll also need to use the 'this' keyword properly in order to make sure you're invoking moveCar on the right object (prius vs mustang).
 
 prius.moveCar(); //increments prius' move property by 10. Returns the new move property.
 mustang.moveCar(); //increments mustang' move property by 10. Returns the new move property.
 
-
-
 //Continuation of previous problem
 
-var getYear = function(){
+var getYear = function() {
   return this.year;
 };
 
+var getPriusYear = getYear.bind(prius);
+var getMustangYear = getYear.bind(mustang);
 // Above you are given a getYear function.  Use the bind function to bind the prius object to the function and save it in a variable called getPriusYear
 // Then use the bind function to bind the mustang to the function and save it in a varabile called getMustangYear
 // Console Log the results of the getPriusYear and getMustangYear to see that they are returning the correct years.
 
-
 //Note(no tests)
-  //Code Here
-
-
-
+//Code Here
+console.log(getPriusYear());
+console.log(getMustangYear());
 //New Problem
 
 var myUser = {
- username: 'iliketurtles',
- age: 13,
- email: 'iliketurtles@gmail.com'
+  username: "iliketurtles",
+  age: 13,
+  email: "iliketurtles@gmail.com"
 };
 
 var getMyUsername = function() {
- return this.username;
+  return this.username;
 };
 
 var userName = getMyUsername(); //Fix this
 
 //Above you're given an object, and  a function. What will the getMyUsername function return?
 //Note(no tests)
-  //Answer Here
-
+//Answer Here
+//undefined
 //In the example above, what is the 'this keyword' bound to when getMyUsername runs?
 
-  //Answer Here
-
-
+//Answer Here
+//window
 //Fix the getMyUsername invocation (stored in the userName variable, at the bottom of the above code) so that userName will be equal to 'iliketurtles'.
-
+var userName = getMyUsername.call(myUser);

user.json

@@ -1,4 +1,4 @@
 {
-  "name": "",
-  "email": ""
+  "name": "Raphael Raquion",
+  "email": "raphael.raquion@boom.camp"
 }